<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>CIDR xref</title>
<link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" />
</head>
<body>
<div id="overview"><a href="../../../../../../api/org/jboss/netty/handler/ipfilter/CIDR.html">View Javadoc</a></div><pre>

<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.ipfilter;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.net.Inet4Address;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.net.Inet6Address;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.net.InetAddress;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.net.UnknownHostException;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.StringTokenizer;
<a class="jxr_linenumber" name="23" href="#23">23</a>  
<a class="jxr_linenumber" name="24" href="#24">24</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="25" href="#25">25</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> <strong class="jxr_keyword">implements</strong> Comparable&lt;CIDR&gt; {
<a class="jxr_linenumber" name="27" href="#27">27</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The base address of the <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> notation */</em>
<a class="jxr_linenumber" name="28" href="#28">28</a>      <strong class="jxr_keyword">protected</strong> InetAddress baseAddress;
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> The mask used in the <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> notation */</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> cidrMask;
<a class="jxr_linenumber" name="32" href="#32">32</a>  
<a class="jxr_linenumber" name="33" href="#33">33</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment">     * Create CIDR using the CIDR Notation</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">     * @return the generated CIDR</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> newCIDR(InetAddress baseAddress, <strong class="jxr_keyword">int</strong> cidrMask) <strong class="jxr_keyword">throws</strong> UnknownHostException {
<a class="jxr_linenumber" name="39" href="#39">39</a>          <strong class="jxr_keyword">if</strong> (cidrMask &lt; 0) {
<a class="jxr_linenumber" name="40" href="#40">40</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="41" href="#41">41</a>          }
<a class="jxr_linenumber" name="42" href="#42">42</a>          <strong class="jxr_keyword">if</strong> (baseAddress instanceof Inet4Address) {
<a class="jxr_linenumber" name="43" href="#43">43</a>              <strong class="jxr_keyword">if</strong> (cidrMask &gt; 32) {
<a class="jxr_linenumber" name="44" href="#44">44</a>                  <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="45" href="#45">45</a>              }
<a class="jxr_linenumber" name="46" href="#46">46</a>              <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> CIDR4((Inet4Address) baseAddress, cidrMask);
<a class="jxr_linenumber" name="47" href="#47">47</a>          }
<a class="jxr_linenumber" name="48" href="#48">48</a>          <em class="jxr_comment">// IPv6.</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>          <strong class="jxr_keyword">if</strong> (cidrMask &gt; 128) {
<a class="jxr_linenumber" name="50" href="#50">50</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="51" href="#51">51</a>          }
<a class="jxr_linenumber" name="52" href="#52">52</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> CIDR6((Inet6Address) baseAddress, cidrMask);
<a class="jxr_linenumber" name="53" href="#53">53</a>      }
<a class="jxr_linenumber" name="54" href="#54">54</a>  
<a class="jxr_linenumber" name="55" href="#55">55</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment">     * Create CIDR using the normal Notation</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">     * @return the generated CIDR</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> newCIDR(InetAddress baseAddress, String scidrMask) <strong class="jxr_keyword">throws</strong> UnknownHostException {
<a class="jxr_linenumber" name="61" href="#61">61</a>          <strong class="jxr_keyword">int</strong> cidrMask = getNetMask(scidrMask);
<a class="jxr_linenumber" name="62" href="#62">62</a>          <strong class="jxr_keyword">if</strong> (cidrMask &lt; 0) {
<a class="jxr_linenumber" name="63" href="#63">63</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="64" href="#64">64</a>          }
<a class="jxr_linenumber" name="65" href="#65">65</a>          <strong class="jxr_keyword">if</strong> (baseAddress instanceof Inet4Address) {
<a class="jxr_linenumber" name="66" href="#66">66</a>              <strong class="jxr_keyword">if</strong> (cidrMask &gt; 32) {
<a class="jxr_linenumber" name="67" href="#67">67</a>                  <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="68" href="#68">68</a>              }
<a class="jxr_linenumber" name="69" href="#69">69</a>              <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> CIDR4((Inet4Address) baseAddress, cidrMask);
<a class="jxr_linenumber" name="70" href="#70">70</a>          }
<a class="jxr_linenumber" name="71" href="#71">71</a>          cidrMask += 96;
<a class="jxr_linenumber" name="72" href="#72">72</a>          <em class="jxr_comment">// IPv6.</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>          <strong class="jxr_keyword">if</strong> (cidrMask &gt; 128) {
<a class="jxr_linenumber" name="74" href="#74">74</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + cidrMask);
<a class="jxr_linenumber" name="75" href="#75">75</a>          }
<a class="jxr_linenumber" name="76" href="#76">76</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> CIDR6((Inet6Address) baseAddress, cidrMask);
<a class="jxr_linenumber" name="77" href="#77">77</a>      }
<a class="jxr_linenumber" name="78" href="#78">78</a>  
<a class="jxr_linenumber" name="79" href="#79">79</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * Create CIDR using the CIDR or normal Notation&lt;BR&gt;</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * i.e.:</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     * CIDR  subnet = newCIDR ("10.10.10.0/24"); or</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">     * CIDR  subnet = newCIDR ("1fff:0:0a88:85a3:0:0:ac1f:8001/24"); or</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">     * CIDR  subnet = newCIDR ("10.10.10.0/255.255.255.0");</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">     * @return the generated CIDR</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> newCIDR(String cidr) <strong class="jxr_keyword">throws</strong> UnknownHostException {
<a class="jxr_linenumber" name="89" href="#89">89</a>          <strong class="jxr_keyword">int</strong> p = cidr.indexOf('/');
<a class="jxr_linenumber" name="90" href="#90">90</a>          <strong class="jxr_keyword">if</strong> (p &lt; 0) {
<a class="jxr_linenumber" name="91" href="#91">91</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid CIDR notation used: "</span> + cidr);
<a class="jxr_linenumber" name="92" href="#92">92</a>          }
<a class="jxr_linenumber" name="93" href="#93">93</a>          String addrString = cidr.substring(0, p);
<a class="jxr_linenumber" name="94" href="#94">94</a>          String maskString = cidr.substring(p + 1);
<a class="jxr_linenumber" name="95" href="#95">95</a>          InetAddress addr = addressStringToInet(addrString);
<a class="jxr_linenumber" name="96" href="#96">96</a>          <strong class="jxr_keyword">int</strong> mask;
<a class="jxr_linenumber" name="97" href="#97">97</a>          <strong class="jxr_keyword">if</strong> (maskString.indexOf('.') &lt; 0) {
<a class="jxr_linenumber" name="98" href="#98">98</a>              mask = parseInt(maskString, -1);
<a class="jxr_linenumber" name="99" href="#99">99</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="100" href="#100">100</a>             mask = getNetMask(maskString);
<a class="jxr_linenumber" name="101" href="#101">101</a>             <strong class="jxr_keyword">if</strong> (addr instanceof Inet6Address) {
<a class="jxr_linenumber" name="102" href="#102">102</a>                 mask += 96;
<a class="jxr_linenumber" name="103" href="#103">103</a>             }
<a class="jxr_linenumber" name="104" href="#104">104</a>         }
<a class="jxr_linenumber" name="105" href="#105">105</a>         <strong class="jxr_keyword">if</strong> (mask &lt; 0) {
<a class="jxr_linenumber" name="106" href="#106">106</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> UnknownHostException(<span class="jxr_string">"Invalid mask length used: "</span> + maskString);
<a class="jxr_linenumber" name="107" href="#107">107</a>         }
<a class="jxr_linenumber" name="108" href="#108">108</a>         <strong class="jxr_keyword">return</strong> newCIDR(addr, mask);
<a class="jxr_linenumber" name="109" href="#109">109</a>     }
<a class="jxr_linenumber" name="110" href="#110">110</a> 
<a class="jxr_linenumber" name="111" href="#111">111</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> @return the baseAddress of the <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> block. */</em>
<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">public</strong> InetAddress getBaseAddress() {
<a class="jxr_linenumber" name="113" href="#113">113</a>         <strong class="jxr_keyword">return</strong> baseAddress;
<a class="jxr_linenumber" name="114" href="#114">114</a>     }
<a class="jxr_linenumber" name="115" href="#115">115</a> 
<a class="jxr_linenumber" name="116" href="#116">116</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> @return the Mask length. */</em>
<a class="jxr_linenumber" name="117" href="#117">117</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getMask() {
<a class="jxr_linenumber" name="118" href="#118">118</a>         <strong class="jxr_keyword">return</strong> cidrMask;
<a class="jxr_linenumber" name="119" href="#119">119</a>     }
<a class="jxr_linenumber" name="120" href="#120">120</a> 
<a class="jxr_linenumber" name="121" href="#121">121</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> @return the textual <a href="../../../../../org/jboss/netty/handler/ipfilter/CIDR.html">CIDR</a> notation. */</em>
<a class="jxr_linenumber" name="122" href="#122">122</a>     @Override
<a class="jxr_linenumber" name="123" href="#123">123</a>     <strong class="jxr_keyword">public</strong> String toString() {
<a class="jxr_linenumber" name="124" href="#124">124</a>         <strong class="jxr_keyword">return</strong> baseAddress.getHostAddress() + '/' + cidrMask;
<a class="jxr_linenumber" name="125" href="#125">125</a>     }
<a class="jxr_linenumber" name="126" href="#126">126</a> 
<a class="jxr_linenumber" name="127" href="#127">127</a>     <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> @return the end address of this block. */</em>
<a class="jxr_linenumber" name="128" href="#128">128</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> InetAddress getEndAddress();
<a class="jxr_linenumber" name="129" href="#129">129</a> 
<a class="jxr_linenumber" name="130" href="#130">130</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment">     * Compares the given InetAddress against the CIDR and returns true if</em>
<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment">     * the ip is in the subnet-ip-range and false if not.</em>
<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> <em class="jxr_javadoccomment">     * @return returns true if the given IP address is inside the currently</em>
<a class="jxr_linenumber" name="135" href="#135">135</a> <em class="jxr_javadoccomment">     *         set network.</em>
<a class="jxr_linenumber" name="136" href="#136">136</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">boolean</strong> contains(InetAddress inetAddress);
<a class="jxr_linenumber" name="138" href="#138">138</a> 
<a class="jxr_linenumber" name="139" href="#139">139</a>     @Override
<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> equals(Object o) {
<a class="jxr_linenumber" name="141" href="#141">141</a>         <strong class="jxr_keyword">if</strong> (!(o instanceof CIDR)) {
<a class="jxr_linenumber" name="142" href="#142">142</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="143" href="#143">143</a>         }
<a class="jxr_linenumber" name="144" href="#144">144</a>         <strong class="jxr_keyword">return</strong> compareTo((CIDR) o) == 0;
<a class="jxr_linenumber" name="145" href="#145">145</a>     }
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>     @Override
<a class="jxr_linenumber" name="148" href="#148">148</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> hashCode() {
<a class="jxr_linenumber" name="149" href="#149">149</a>         <strong class="jxr_keyword">return</strong> baseAddress.hashCode();
<a class="jxr_linenumber" name="150" href="#150">150</a>     }
<a class="jxr_linenumber" name="151" href="#151">151</a> 
<a class="jxr_linenumber" name="152" href="#152">152</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment">     * Convert an IPv4 or IPv6 textual representation into an</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment">     * InetAddress.</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_javadoccomment">     * @return the created InetAddress</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="158" href="#158">158</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> InetAddress addressStringToInet(String addr) <strong class="jxr_keyword">throws</strong> UnknownHostException {
<a class="jxr_linenumber" name="159" href="#159">159</a>         <strong class="jxr_keyword">return</strong> InetAddress.getByName(addr);
<a class="jxr_linenumber" name="160" href="#160">160</a>     }
<a class="jxr_linenumber" name="161" href="#161">161</a> 
<a class="jxr_linenumber" name="162" href="#162">162</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment">     * Get the Subnet's Netmask in Decimal format.&lt;BR&gt;</em>
<a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment">     * i.e.: getNetMask("255.255.255.0") returns the integer CIDR mask</em>
<a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment">     * @param netMask a network mask</em>
<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment">     * @return the integer CIDR mask</em>
<a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="169" href="#169">169</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> getNetMask(String netMask) {
<a class="jxr_linenumber" name="170" href="#170">170</a>         StringTokenizer nm = <strong class="jxr_keyword">new</strong> StringTokenizer(netMask, <span class="jxr_string">"."</span>);
<a class="jxr_linenumber" name="171" href="#171">171</a>         <strong class="jxr_keyword">int</strong> i = 0;
<a class="jxr_linenumber" name="172" href="#172">172</a>         <strong class="jxr_keyword">int</strong>[] netmask = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[4];
<a class="jxr_linenumber" name="173" href="#173">173</a>         <strong class="jxr_keyword">while</strong> (nm.hasMoreTokens()) {
<a class="jxr_linenumber" name="174" href="#174">174</a>             netmask[i] = Integer.parseInt(nm.nextToken());
<a class="jxr_linenumber" name="175" href="#175">175</a>             i++;
<a class="jxr_linenumber" name="176" href="#176">176</a>         }
<a class="jxr_linenumber" name="177" href="#177">177</a>         <strong class="jxr_keyword">int</strong> mask1 = 0;
<a class="jxr_linenumber" name="178" href="#178">178</a>         <strong class="jxr_keyword">for</strong> (i = 0; i &lt; 4; i++) {
<a class="jxr_linenumber" name="179" href="#179">179</a>             mask1 += Integer.bitCount(netmask[i]);
<a class="jxr_linenumber" name="180" href="#180">180</a>         }
<a class="jxr_linenumber" name="181" href="#181">181</a>         <strong class="jxr_keyword">return</strong> mask1;
<a class="jxr_linenumber" name="182" href="#182">182</a>     }
<a class="jxr_linenumber" name="183" href="#183">183</a> 
<a class="jxr_linenumber" name="184" href="#184">184</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="185" href="#185">185</a> <em class="jxr_javadoccomment">     * @param intstr a string containing an integer.</em>
<a class="jxr_linenumber" name="186" href="#186">186</a> <em class="jxr_javadoccomment">     * @param def    the default if the string does not contain a valid</em>
<a class="jxr_linenumber" name="187" href="#187">187</a> <em class="jxr_javadoccomment">     *               integer.</em>
<a class="jxr_linenumber" name="188" href="#188">188</a> <em class="jxr_javadoccomment">     * @return the inetAddress from the integer</em>
<a class="jxr_linenumber" name="189" href="#189">189</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="190" href="#190">190</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> parseInt(String intstr, <strong class="jxr_keyword">int</strong> def) {
<a class="jxr_linenumber" name="191" href="#191">191</a>         Integer res;
<a class="jxr_linenumber" name="192" href="#192">192</a>         <strong class="jxr_keyword">if</strong> (intstr == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="193" href="#193">193</a>             <strong class="jxr_keyword">return</strong> def;
<a class="jxr_linenumber" name="194" href="#194">194</a>         }
<a class="jxr_linenumber" name="195" href="#195">195</a>         <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="196" href="#196">196</a>             res = Integer.decode(intstr);
<a class="jxr_linenumber" name="197" href="#197">197</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a class="jxr_linenumber" name="198" href="#198">198</a>             res = def;
<a class="jxr_linenumber" name="199" href="#199">199</a>         }
<a class="jxr_linenumber" name="200" href="#200">200</a>         <strong class="jxr_keyword">return</strong> res.intValue();
<a class="jxr_linenumber" name="201" href="#201">201</a>     }
<a class="jxr_linenumber" name="202" href="#202">202</a> 
<a class="jxr_linenumber" name="203" href="#203">203</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_javadoccomment">     * Compute a byte representation of IpV4 from a IpV6</em>
<a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="206" href="#206">206</a> <em class="jxr_javadoccomment">     * @return the byte representation</em>
<a class="jxr_linenumber" name="207" href="#207">207</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the IpV6 cannot be mapped to IpV4</em>
<a class="jxr_linenumber" name="208" href="#208">208</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="209" href="#209">209</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> byte[] getIpV4FromIpV6(Inet6Address address) {
<a class="jxr_linenumber" name="210" href="#210">210</a>         byte[] baddr = address.getAddress();
<a class="jxr_linenumber" name="211" href="#211">211</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 9; i++) {
<a class="jxr_linenumber" name="212" href="#212">212</a>             <strong class="jxr_keyword">if</strong> (baddr[i] != 0) {
<a class="jxr_linenumber" name="213" href="#213">213</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"This IPv6 address cannot be used in IPv4 context"</span>);
<a class="jxr_linenumber" name="214" href="#214">214</a>             }
<a class="jxr_linenumber" name="215" href="#215">215</a>         }
<a class="jxr_linenumber" name="216" href="#216">216</a>         <strong class="jxr_keyword">if</strong> (baddr[10] != 0 &amp;&amp; baddr[10] != 0xFF || baddr[11] != 0 &amp;&amp; baddr[11] != 0xFF) {
<a class="jxr_linenumber" name="217" href="#217">217</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"This IPv6 address cannot be used in IPv4 context"</span>);
<a class="jxr_linenumber" name="218" href="#218">218</a>         }
<a class="jxr_linenumber" name="219" href="#219">219</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> byte[]
<a class="jxr_linenumber" name="220" href="#220">220</a>                 {baddr[12], baddr[13], baddr[14], baddr[15]};
<a class="jxr_linenumber" name="221" href="#221">221</a>     }
<a class="jxr_linenumber" name="222" href="#222">222</a> 
<a class="jxr_linenumber" name="223" href="#223">223</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_javadoccomment">     * Compute a byte representation of IpV6 from a IpV4</em>
<a class="jxr_linenumber" name="225" href="#225">225</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * @return the byte representation</em>
<a class="jxr_linenumber" name="227" href="#227">227</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException if the IpV6 cannot be mapped to IpV4</em>
<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="229" href="#229">229</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> byte[] getIpV6FromIpV4(Inet4Address address) {
<a class="jxr_linenumber" name="230" href="#230">230</a>         byte[] baddr = address.getAddress();
<a class="jxr_linenumber" name="231" href="#231">231</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> byte[]
<a class="jxr_linenumber" name="232" href="#232">232</a>                 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, baddr[0], baddr[1], baddr[2], baddr[3]};
<a class="jxr_linenumber" name="233" href="#233">233</a>     }
<a class="jxr_linenumber" name="234" href="#234">234</a> }
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>

